Writing IS editing. And editing IS removing content. Be prepared to remove a sentence, a paragraph, a page, a chapter, ten chapters, if you have to. You cannot be precious about your words. You can enjoy writing said sentence, paragraph, page, chapter, chapters and, after that, you need to ask yourself if they add anything to the story. If they don’t, hit the delete button! And if it feels too painful, cut and paste it in a separate, and dated, document entitled ‘Put aside’. Content will not be lost but it most probably will not be re-used.